..It is shown that this procedure offers various advantages compared to existing conventional methods for the analysis of multisubject studies, in particular it is more sensitive to underlying activations...

Dynamic causal modelling of evoked responses: the role of intrinsic connections

..Another application is to hierarchical linear models, which are used for modeling multisubject data. To illustrate our approach, we apply it to some typical modeling scenarios in fMRI data analysis...

..This means the approach automatically selects either a sparse or a distributed model, depending on the data. The scheme is compared with conventional applications of Bayesian solutions to quantify the improvement in performance...

..Our results provide empirical evidence for nonlinear coupling among distributed neuronal sources in the motor system and that these play an important role in modulating spectral responses under normal conditions...

How the human brain recognizes speech in the context of changing speakers

..Our results point to a network account of speech recognition, in which information about the speech message and the speaker's vocal tract are combined to solve the difficult task of understanding speech from different speakers...

The functional anatomy of the MMN: a DCM study of the roving paradigm

Marta I GarridoWellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, UKNeuroimage 42:936-44. 2008

..The ensuing proof-of-concept may be important because the free-energy formulation furnishes a unified account of both action and perception and may speak to a reappraisal of the role of dopamine in the brain...

Brain responses to the acquired moral status of faces

Tania SingerWellcome Department of Imaging Neuroscience, Institute of Neurology, University College of London, London WC1N 3BG, United KingdomNeuron 41:653-62. 2004

..Our data indicate that rapid learning regarding the moral status of others is expressed in altered neural activity within a system associated with social cognition...

Observing the observer (II): deciding when to decide

Jean DaunizeauWellcome Trust Centre for Neuroimaging, University College of London, London, United KingdomPLoS ONE 5:e15555. 2010

..Finally, we illustrate how our approach can be used to quantify subjective beliefs and preferences that underlie inter-individual differences in behaviour...

..At the group level the FB-model supervened. We discuss these findings in terms of the validity and usefulness of DCM in characterising EEG/MEG data and its ability to model ERPs in a mechanistic fashion...

Dynamic causal models of neural system dynamics:current state and future extensions

..Here, by analysing the time-frequency decompositions of single channel EEG data we show that RFT adjustments can be used in the analysis of electrophysiological data and illustrate the advantages of this method over existing approaches...